Inspiration: they classic game Marco, Polo. One person is it and can't open their eyes, when they say "Marco" the other says "Polo"
Marco and Polo are two small, and separate creatures that work together. (Both are mechanical)
Polo is on the left of the image, Polo is incapable of harming the player directly, Polo's gimmick is that he sends a signal to Marco and tells him where the player is.
Marco is blind, Marco relies on noise to tell where a player is, Polo tells Marco where to go when he spots a player, Marco has a saw on his arm, which he uses to slash players when he attacks them.
Polo can't hear players but can see them from a far distance.
Marco is blind, but can hear players extremely well.
They are roughly the same size as the player, and roam freely from eachother.